A comparative study of the gastric ossicles of Trichodactylidae crabs (Brachyura: Decapoda) with comments on the role of diet and phylogeny in shaping morphological traits

Carvalho, Débora de Azevedo; Collins, Pablo Agustín; Lima-Gomes, Renata C. de; Magalhães, Célio; Torres, María Victoria; Williner, Verónica

doi:10.7717/peerj.5028

Cited by 8 publications

(5 citation statements)

References 48 publications

(130 reference statements)

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“…Additionally, the gastric mill was studied in the light of age determination 17 – 21 and communication 22 . As this part of the stomach is morphologically diverse 23 , 24 , it triggered an ongoing discussion 25 to which extent the shapes of the gastric mill components reflect adaptations to food items and feeding habits 4 , 10 , 26 – 32 or phylogenetic constrains 4 , 5 , 33 – 35 .…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties, degree of sclerotisation and elemental composition of the gastric mill in the red swamp crayfish Procambarus clarkii (Decapoda, Crustacea)

Krings

Brütt

Gorb

2022

Sci Rep

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The gastric mill of Decapoda is a unique feature, which comprises teeth, stabilizing ossicles, and particle sorting setae. Involved in the fragmentation and sorting of the food, this structure serves as interface between the organism and its environment. As material properties complement morphology and hold information about function and trophic preferences, we here provide a basis for more comparative research on gastric mills. For gastric mill components of the adult red swamp crayfish Procambarus clarkii, we studied (a) the micro-structure via scanning electron microscopy, (b) the elemental composition by energy-dispersive X-ray spectroscopy, (c) the heterogeneities in material properties and degree of tanning (autofluorescence) by confocal laser scanning microscopy, and (d) the mechanical properties hardness and elasticity by nanoindentation technique. The morphology and micro-structure were previously described for this species, but the mechanical properties and the autofluorescence were not studied before. As epicuticle and exocuticle could be analyzed individually, material property gradients, with values decreasing from the interacting surface towards interior, could be determined. Finally, we were able to relate the mechanical property data with the elemental composition and the degree of tanning. We found that the epicuticle of the teeth is among the hardest and stiffest biological materials in invertebrates due to the incorporations of high proportions of silicon.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties, degree of sclerotisation and elemental composition of the gastric mill in the red swamp crayfish Procambarus clarkii (Decapoda, Crustacea)

Krings

Brütt

Gorb

2022

Sci Rep

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“…A pair of lateral teeth plates, along with other ossicles, participate in food grinding and maceration (Brösing, 2010; Carvalho et al, 2018; Davie et al, 2015). Therefore, the morphology of the median and lateral teeth plate is a useful indicator for determining the substrate types associated with the habitats of deposit‐feeding crabs.…”

Section: Discussionmentioning

confidence: 99%

“…The morphology of the gastric mill is often considered species‐specific (Allardyce & Linton, 2010; Brösing, 2010; Carvalho et al, 2018; Naderloo et al, 2010) and sometimes used for the purpose of distinguishing between families, genera, species including even cryptic species (Brösing, 2010; Brösing et al, 2007; Felgenhauer & Abele, 1989; Naderloo et al, 2010; Shih, 2015). Therefore, it may be reflected by crab's phylogeny in addition to their feeding ecology.…”

Section: Introductionmentioning

confidence: 99%

Morphology of the gastric mill teeth in dotillid crabs (Crustacea: Brachyura: Dotillidae) from Indonesia

Murniati

Asakura

Nakano

et al. 2023

Journal of Morphology

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The gastric mill is a prominent structure in the digestive system of brachyuran crabs, consisting of a median tooth plate and a pair of lateral tooth plates. Among crab species that are deposit feeders, the morphology and size of the gastric mill teeth are correlated with the preferred substrate types and food spectrum. In this study, we provide a detailed description of the morphology of the median and lateral teeth of the gastric mills in eight species of dotillid crabs from Indonesia, and compare them in relation to habitat preferences and molecular phylogeny.Ilyoplax delsmani, Ilyoplax orientalis, and Ilyoplax strigicarpus have comparatively simple shapes of their median and lateral teeth, with fewer teeth on each lateral tooth plate compared to Dotilla myctiroides, Dotilla wichmanni, Scopimera gordonae, Scopimera intermedia, and Tmethypocoelis aff. ceratophora, which have more complexly shaped median and lateral teeth, with a greater number of teeth on each lateral tooth plate. The number of teeth on lateral tooth correlates with habitat preference, that is, dotillid crabs inhabiting muddy substrata have fewer teeth on the lateral tooth plate, and those inhabiting sandy substrata have a more teeth. Phylogenetic analysis using partial COI and 16S rRNA genes supports that teeth morphology is similar among closely related species. Therefore, the description of median and lateral teeth of the gastric mill is expected to contribute to the systematic study of dotillid crabs.

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“…Juveniles of T. borellianus and A. uruguayana ingest more animal items than adults [55,58,109], while M. borellii seem to maintain a preference to animal components during their entire life cycle [54]. Morphological traits of chelae and mandibles of A. uruguayana are different between juveniles and adults [109] and, in T. borellianus, feeding apparatus are adapted to cope with dietary changes [63,110]. As regards digestive physiology, juveniles of A. uruguayana exhibited higher amylase activity than adults [68] and the metabolic profile varied with the season and ontogeny [67].…”

Section: Discussionmentioning

confidence: 99%

Consumer-driven nutrient recycling of freshwater decapods: linking ecological theories and application in integrated multi-trophic aquaculture

Musin

Torres

Carvalho

2022

Preprint

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The Metabolic Theory of Ecology (MET) and the Ecological Stoichiometry Theory (EST) are central and complementary in the consumer-driven recycling conceptual basis. The comprehension of physiological processes of organisms at different levels of organizations is essential to explore and predict nutrient recycling behavior in different scenarios, and to design integrated productive systems that efficiently use the nutrient inputs through an adjusted mass balance. We fed with fish-feed three species of decapods from different families and with aquacultural potential to explore the animal-mediated nutrient dynamic and its applicability in productive systems. We tested whether physiological (body mass, body elemental content), ecological (diet), taxonomic and experimental (time of incubation) variables predicts N and P excretion rates and ratios across and within taxa. We also analysed body mass and body elemental content independently as predictors of N and P excretion of decapods across, among and within taxa. Finally, we verified if body content scales allometrically across and within taxa and if differed among taxa. Body mass and taxonomic identity predicted nutrient excretion rates both across and within taxa. When physiological variables were analysed independently, body size best predicted nutrient mineralization in both scales of analyses. Regarding body elemental content, only body P content scaled negatively with body mass across taxa. Results showed higher N-requirements and lower C:N of prawns than anomurans and crabs. The role of crustaceans as nutrient recyclers depends mainly on the species and body mass, and should be considered to select complementary species that efficiently use feed resources. Prawns need more protein in their feed and might be integrated with fish of higher N-requirements, while crabs and anomurans, with fish of lower N-requirements. Our study contributed to the background of MTE and EST through empirical data obtained from decapods and provided useful information to achieve more efficient aquaculture integration systems.

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A comparative study of the gastric ossicles of Trichodactylidae crabs (Brachyura: Decapoda) with comments on the role of diet and phylogeny in shaping morphological traits

Cited by 8 publications

References 48 publications

Mechanical properties, degree of sclerotisation and elemental composition of the gastric mill in the red swamp crayfish Procambarus clarkii (Decapoda, Crustacea)

Mechanical properties, degree of sclerotisation and elemental composition of the gastric mill in the red swamp crayfish Procambarus clarkii (Decapoda, Crustacea)

Morphology of the gastric mill teeth in dotillid crabs (Crustacea: Brachyura: Dotillidae) from Indonesia

Consumer-driven nutrient recycling of freshwater decapods: linking ecological theories and application in integrated multi-trophic aquaculture

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